| Rubiaceae Juss., 1789 |
| Rubieae Baill., 1880 |
| Rubioideae Bremek. ex Verdc., 1958 |
| Rudgea Salisb., 1807 |
| Rudgea alvarezii Borhidi & Lozada-Pérez, 2005 |
| Rudgea ceratopetala Donn. Sm., 1903 |
| Rudgea cornifolia (Kunth) Standl., 1931 |
| Rudgea fimbriata (Benth.) Standl., 1925 |
| Sabicea Aubl., 1775 |
| Sabicea costaricensis Wernham, 1914 |
| Sabicea flagenioides Wernham, 1914 |
| Sabicea glabrescens Benth., 1841 |
| Sabicea hirsuta Kunth, 1820 |
| Sabicea mexicana Wernham, 1914 |
| Sabicea panamensis Wernham, 1914 |
| Sabicea villosa Willd. ex Roem. & Schult., 1819 |
| Sabiceeae Bremek., 1934 |
| Schiedea Bartl., 1830 |
| Schiedea mexicana Bartl. ex DC., 1830 |
| Sherardia L., 1753 |